Homework Answers
![. HA + H₂O - H₂ot (aq) + Frans ᎾᏭ Ꮽ = IM O 0 AA I= Teq (1-x) 2 ka CH3O+] [F] [HE] 2 = 6.9x104 1-X =) x2 - 6.7 X10-4 Neglectin](http://img.homeworklib.com/questions/2ee423d0-c606-11eb-bd48-4d79a2d743d1.png?x-oss-process=image/resize,w_560)
I have neglected the x from
the denominator because acid dissociation constant is very low
.
The correct option will be b which is given at third position where answer is to be marked.
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Hydrofluoric Acid has a dissociation constant at 25°C of 6.7 x10-4. If 1.0 mol of HF...
8) The Ka of hydrofluoric acid (HF) at 25.0 C is 6.8 x10-4. What is the...
8) The Ka of hydrofluoric acid (HF) at 25.0 C is 6.8 x10-4. What is the pH of a 0.15 M aqueous 8) solution of HF? A) 4.60 B) 0.82 C)3.64 D) 1.17 E) 2.00
8a) 0.263 moles of para-aminobenzoic acid (HC,H.NO2) are dissolved in enough water to make a final...
8a) 0.263 moles of para-aminobenzoic acid (HC,H.NO2) are dissolved in enough water to make a final volume of 2.0 L. The resulting solution has a pH of 2.58. What is the hydronium ion concentration of the solution? a. 0.132 M b.0.13 M c. 0.88 M d.0.00263M a. Ob. O c. Od. 8b) 0.263 moles of para-aminobenzoic acid (HC,H.NO,) are dissolved in enough water to make a final volume of 2.0 L. The resulting solution has a pH of 2.58. What...
Q 21: Which of the following is the strongest acid? A) HF (K, for HF is...
Q 21: Which of the following is the strongest acid? A) HF (K, for HF is 7.2 x 10-4) B) HCN (K for HCN is 4.9 x 10-10) C) HCNO (K for HCNO is 2 x 10-4) D) H3B03 (K, for H3B03 is 5.4 x 10-10) OA B с D Question 22 (2.439024 points) We were unable to transcribe this imageQuestion 23 (2.439024 points) Q 23: Which of the following is the weakest acid? A) HF (K, for HF is...
a) (4 marks) HA (aq) is a weak acid with a dissociation constant, Ka, of 1.0...
a) (4 marks) HA (aq) is a weak acid with a dissociation constant, Ka, of 1.0 x 10-11. What is the pH of a 0.061 M solution in A- (aq)? The temperature is 25oC. (b) (4 points) For the reaction A (g) ⇋ B (g) + C (g), the equilibrium constant is 1.80 at 25.0oC and 4.71 at 75.0oC. Making the approximation that ΔH and ΔS do not change with temperature, calculate the value of the equilibrium constant at 50.0oC...
D Question 4 5 pts 2b) There are 0.10 moles of N2O4 and 0.20 moles of...
D Question 4 5 pts 2b) There are 0.10 moles of N2O4 and 0.20 moles of NO 2 present in a 2.0 L container which may react according to: N2O4(g) = 2N028) Kp = 11 What is the value of Qp for the initial gas mixture? a. 4.0 b. 0.20 c. 0.40 d.5.0 . a. b. Consider the following equilibrium systems. Which direction will the reactions shift (reactants or products) when cooled? 200g + O2(g) = 2CO2(g) H2e+12(e)=2HI® H2(g) +126)...
#4 (a) HA(aq) is a weak acid with a dissociation constant, Ka, of 1.0 x 10-11....
#4 (a) HA(aq) is a weak acid with a dissociation constant, Ka, of 1.0 x 10-11. What is the pH of a solution 0.061 M in A-(aq)? The temperature is 25oC. (b) For the reaction A(g) ⇋ B(g) + C(g), the equilibrium constant is 1.80 at 25.0oC and 4.14 at 75.0oC. Assuming ΔH and ΔS do not change with the temperature, calculate the value of the equilibrium constant at 50.0oC and the value of ΔSuniverse at 50.0oC.
4. Using Table 15B-4, indicate the stronger acid in each pair. a. HI, H, SO b....
4. Using Table 15B-4, indicate the stronger acid in each pair. a. HI, H, SO b. HF HCN c. H2O2, HCHO, d. H_BO4, H3PO4 ssholds as e. HCl, HClO ahle 158-4 Relative Strengths of Some Acids and Bases Acid K very large very large very large very large very large very large Perchloric acid Hydriodic acid Hydrobromic acid Hydrochloric acid Sulfuric acid Nitric acid Sulfurous acid Hydrogen sulfate ion Phosphoric acid Hydrofluoric acid Formic acid Acetic acid Carbonic acid Hypochlorous...
7) Which one of the following is the weakest acid? A) HF (Ka = 6.8 ×...
7) Which one of the following is the weakest acid? A) HF (Ka = 6.8 × 10-4) B) HClO (Ka = 3.0 × 10-8) C) HNO2 (Ka = 4.5 × 10-4) D) HCN (Ka = 4.9 × 10-10) B) 5.7 x 10–2 M D) 2.9 x 10–3 M 22) Calculate the hydrogen ion concentration in a solution of iced tea with lemon having a pH of 2.87. A) 2.9x10–2M D) 2.9x10–3M B) 5.7 x 10–2 M E) 5.7 x 10–4...
12. If the acetic acid dissociation constant is 1.8 X 10-5 Ka, and its concentration before...
12. If the acetic acid dissociation constant is 1.8 X 10-5 Ka, and its concentration before dissociation (0.15M), the concentration of H+] is equal to the following equilibrium equation. CH,COOH = CH.COO+H* B) 6.41 X 104 C)2.62 X 104 D)1.64 X 10 13. When dissolved (1.93 g) of HNO, acid (MW=47) and dilute the volume to 500 ml the H concentration in the solution was 7.63X10 M, the value of the dissociation constant Ka was equal to : A) 8...
15) The pH of a 0.63 M aqueous solution of hypobromous acid, HBrO, at 25°C is...
15) The pH of a 0.63 M aqueous solution of hypobromous acid, HBrO, at 25°C is 4.17. What is the value of K for HBro? a) 2.0 x 10 b) 1.1 x 10 c) 1.08 x 10° d) 7.34 x 10 e) 6.8 x 10 16) The molar concentration of hydronium ion in pure water at 25°C is (á) 1.0 x 10? b) 0.00 c) 1.0 x 1024 d) 1.0 e) 7.00 117) A solution is prepared by dissolving 0.23...
8) The Ka of hydrofluoric acid (HF) at 25.0 C is 6.8 x10-4. What is the pH of a 0.15 M aqueous 8) solution of HF? A) 4.60 B) 0.82 C)3.64 D) 1.17 E) 2.00
8a) 0.263 moles of para-aminobenzoic acid (HC,H.NO2) are dissolved in enough water to make a final volume of 2.0 L. The resulting solution has a pH of 2.58. What is the hydronium ion concentration of the solution? a. 0.132 M b.0.13 M c. 0.88 M d.0.00263M a. Ob. O c. Od. 8b) 0.263 moles of para-aminobenzoic acid (HC,H.NO,) are dissolved in enough water to make a final volume of 2.0 L. The resulting solution has a pH of 2.58. What...
Q 21: Which of the following is the strongest acid? A) HF (K, for HF is 7.2 x 10-4) B) HCN (K for HCN is 4.9 x 10-10) C) HCNO (K for HCNO is 2 x 10-4) D) H3B03 (K, for H3B03 is 5.4 x 10-10) OA B с D Question 22 (2.439024 points) We were unable to transcribe this imageQuestion 23 (2.439024 points) Q 23: Which of the following is the weakest acid? A) HF (K, for HF is...
D Question 4 5 pts 2b) There are 0.10 moles of N2O4 and 0.20 moles of NO 2 present in a 2.0 L container which may react according to: N2O4(g) = 2N028) Kp = 11 What is the value of Qp for the initial gas mixture? a. 4.0 b. 0.20 c. 0.40 d.5.0 . a. b. Consider the following equilibrium systems. Which direction will the reactions shift (reactants or products) when cooled? 200g + O2(g) = 2CO2(g) H2e+12(e)=2HI® H2(g) +126)...
4. Using Table 15B-4, indicate the stronger acid in each pair. a. HI, H, SO b. HF HCN c. H2O2, HCHO, d. H_BO4, H3PO4 ssholds as e. HCl, HClO ahle 158-4 Relative Strengths of Some Acids and Bases Acid K very large very large very large very large very large very large Perchloric acid Hydriodic acid Hydrobromic acid Hydrochloric acid Sulfuric acid Nitric acid Sulfurous acid Hydrogen sulfate ion Phosphoric acid Hydrofluoric acid Formic acid Acetic acid Carbonic acid Hypochlorous...
12. If the acetic acid dissociation constant is 1.8 X 10-5 Ka, and its concentration before dissociation (0.15M), the concentration of H+] is equal to the following equilibrium equation. CH,COOH = CH.COO+H* B) 6.41 X 104 C)2.62 X 104 D)1.64 X 10 13. When dissolved (1.93 g) of HNO, acid (MW=47) and dilute the volume to 500 ml the H concentration in the solution was 7.63X10 M, the value of the dissociation constant Ka was equal to : A) 8...
15) The pH of a 0.63 M aqueous solution of hypobromous acid, HBrO, at 25°C is 4.17. What is the value of K for HBro? a) 2.0 x 10 b) 1.1 x 10 c) 1.08 x 10° d) 7.34 x 10 e) 6.8 x 10 16) The molar concentration of hydronium ion in pure water at 25°C is (á) 1.0 x 10? b) 0.00 c) 1.0 x 1024 d) 1.0 e) 7.00 117) A solution is prepared by dissolving 0.23...
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